Specifically made for carb tuning on small 4 stroke engines. Highly visible LCD digital display in a compact size. Internal battery lets you move meter from kart to kart without messing with power wires; can also be hardwired into power source (back lighting requires hard wiring). Display range: 12.1-16.8. Measures 2 3/8 in. W x 1 5/16 in. H x 5/8 in. D. Includes O2 sensor.

Specifically made for carb tuning on small 4 stroke engines. Highly visible LCD digital display in a compact size. Internal battery lets you move meter from kart to kart without messing with power wires; can also be hardwired into power source (back lighting requires hard wiring). Display range: 10 to 24. Measures 2 3/8 in. W x 1 5/16 in. H x 5/8 in. D. Includes O2 sensor.

This nice back lighted Wideband Air/Fuel Ratio Gauge will give you precious information on your engine. It will allow you to tune more precisely your engine. It's warning could even save your engine from bad damage! Its programmable warning will tell if your engine run too lean or too rich. Work on 2 and 4 strokes
engines. Require 12V DC power.